Related Experiment Video
Updated: May 17, 2026

Assays for the Specific Growth Rate and Cell-binding Ability of Rotavirus
Published on: January 28, 2019
Molecular Epidemiology of Rotavirus Strains Circulating among Children with Gastroenteritis in Iran
Mohammad Kargar1, Maryam Zare, Akram Najafi
1Department of Microbiology, Jahrom Branch, Islamic Azad University, Jahrom, Iran.
Insights
Rotavirus infection affects over 28% of young children with acute gastroenteritis in Marvdasht, Iran. Continuous surveillance is crucial for diarrhea prevention and informing rotavirus vaccine introduction strategies.
Area of Science:
- Virology
- Pediatrics
- Public Health
Background:
- Rotavirus is a leading cause of severe gastroenteritis in children globally.
- Understanding regional rotavirus epidemiology and genotypes is vital for effective control strategies.
Purpose of the Study:
- To determine the prevalence of rotavirus infection in children under five with acute gastroenteritis in Marvdasht, Iran.
- To identify the circulating rotavirus genotypes in this population.
Main Methods:
- Stool samples from 141 children (1 month-5 years) with severe diarrhea were analyzed.
- Enzyme immunoassays (EIA) detected group A rotaviruses.
- Nested RT-PCR was used for rotavirus genotyping.
Main Results:
- Rotavirus was detected in 28.37% of children.
- Infection peaked in summer and was most common in the first two years of life.
- Mixed G genotypes predominated (60%), with G2, G4, and G1 also detected. G3/G8 mixed infection was reported for the first time in Iran.
Conclusions:
- High rotavirus prevalence necessitates ongoing surveillance.
- Monitoring new rotavirus strains is essential for public health policy and vaccine decisions.
Objective:
This study was conducted to evaluate the prevalence of rotavirus disease and to investigate the genotypes of rotavirus strains causing acute gastroenteritis among children aged <5 years old in Marvdasht, Iran.
Methods:
One hundred and forty-one children, aged 1 month to 5 years, afflicted with severe diarrhea were enrolled during January 2007 to December 2008. Their stool samples were studied with enzyme immunoassays (EIA) for group A rotaviruses. Rotavirus-positive specimens were genotyped by the Nested RT-PCR using different types of specific primers.
Findings:
Out of total collected samples rotavirus infection was detected in 40 (28.37%). Of the rotavirus episodes, 72.91% occurred during the first 2 years of life (P=0.038). The highest prevalence of infection was identified in summer (52.50%) and the lowest in winter (7.50%). The most common clinical features included diarrhea (96.25%), vomiting (82.50%) and fever (45.0%). Mixed genotypes were the predominant G type (60.0%), followed by non-typeable (12.50%), G2 (12.50%), G4 (10.0%) and G1 (5.0%) genotypes. G3/G8 mixed infection is the first of these rotavirus genotypes to be reported in Iran.
Conclusion:
Regarding high frequency of rotavirus infection, continuous surveillance is needed to inform diarrhea prevention programs as well as to provide information about the occurrence of new rotavirus strains. This will assist policy makers in decision making on rotavirus vaccine introduction.
Related Concept Videos
Bacterial Gastroenteritis
Investigation of Disease Outbreaks
Viruses of Archaea
Size and Structure of Viral Genomes
Viral Hepatitis I: Introduction

